#include<stdio.h>

int main()
{
    /*局部变量声明*/
    int a, b;
    int c;

    /*实际初始化*/
    a = 10;
    b = 20;
    c = a + b;

    printf("value of a = %d, b=%d and c = %d\n", a, b, c);

    return 0;
}